Optimization of Energy Efficient Transmission in Underwater Sensor Networks

Underwater communication is a challenging topic due to its singular channel characteristics. Most protocols used in terrestrial wireless communication cannot be directly applied in the underwater world. In this paper, the authors focus on the issue of energy efficient transmission in Under-Water Sensor Networks (UWSNs) and analyze this problem in a rigorous and theoretical way. They formalize an optimization problem which aims to minimize energy consumption and simultaneously accounts for other performance metrics such as the data reliability and the communication delay. With the help of Karush-Kuhn-Tucker conditions (KKT conditions), they derive a simple and explicit, but nevertheless accurate, approximate solution under reasonable assumptions.